Candida:
The antecubital and popliteal fossae in young chubby babies are areas where they can get a candidal yeast infection due to humidity and wetness. You can use nystatin topically three times a day for 4 weeks. Also important to keep the area dry, consider using vaseline to keep the area from getting wet.
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2

Good idea:
Whether to prevent your spreading it to the babies or to discover if you caught it from work and need to advice the facility - yes. See a doc for exam and/or lab work. Also, if it is painful - relief will be nice. Best wishes for it being a minor easy to correct issue.
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5

Nerve endings:
That sensation probably represents irritability in the superficial nerves of the leg. Since there are no other neurological symptoms,it probably isn't a serious problem but it would be worthwhile to check for vitamin B 12 deficiency if symptoms persist. A neurologist could advise you further as needed.
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8

Pregnancy:
The hormonal changes and additional joint stress that occur in your body during and after pregnancy can be some factors that alter the looseness in your joints. This is temporary and your body can recover with time. Be patient, and careful with your joints and talk to your provider about how to guide you according to known risk factors specific to you.
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9

Not necessarily:
Eczema typically presents in the flexor surfaces (elbow and knee crease) during childhood, with involvement of the extensor (elbows, knees, ankles) in adults. As you see from your own experience, this trend is not universal. That being said, pattern of eczema is largely individualized, and not necessarily patterned according to familial patterns.
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